Building microbial consortia to enhance straw degradation, phosphorus solubilization, and soil fertility for rice growth

作者：Songhao Che, Yufeng Xu, Xueting Qin, Shiqi Tian, Jianing Wang, Xueying Zhou, Zhenning Cao, Dongchao Wang, Meikang Wu, Zhihai Wu, Meiying Yang, Wu Lei, Xue Yang · 发表于：Microbial Cell Factories · 年份：2024 · DOI：10.1186/s12934-024-02503-0 · 被引用次数：24 · 研究领域：Plant nutrient uptake and metabolism、Biofuel production and bioconversion、Wastewater Treatment and Nitrogen Removal

Straw pollution and the increasing scarcity of phosphorus resources in many regions of China have had severe impacts on the growing conditions for crop plants. Using microbial methods to enhance straw decomposition rate and phosphorus utilization offers effective solutions to address these problems. In this study, a microbial consortium 6 + 1 (consisting of a straw-degrading bacterium and a phosphate-solubilizing bacterium) was formulated based on their performance in straw degradation and phosphorus solubilization. The degradation rate of straw by 6 + 1 microbial consortium reached 48.3% within 7 days (The degradation ability was 7% higher than that of single bacteria), and the phosphorus dissolution rate of insoluble phosphorus reached 117.54 mg·L − 1 (The phosphorus solubilization ability was 29.81% higher than that of single bacteria). In addition, the activity of lignocellulosic degrading enzyme system was significantly increased, the activities of endoglucanase, β-glucosidase and xylanase in the microbial consortium were significantly higher than those in the single strain (23.16%, 28.02% and 28.86%, respectively). Then the microbial consortium was processed into microbial agents and tested in rice pots. The results showed that the microbial agent significantly increased the content of organic matter, available phosphorus and available nitrogen in the soil. Ongoing research focuses on the determination of the effects and mechanisms of a functional hybrid system of straw...